Is glucose present in cold and room temperature milk

The sugar found in milk is called lactose. Lactose is a disaccharide made up of glucose and galactose. So in a sense, glucose is present in milk, but not in its isolated form and not in a way that makes it easily accessible for the human body to consume.

You need to have the lactase enzyme in order to break down lactose into glucose and galactose. It has been estimated that about 75% of the human population experiences a decrease in lactase production by the time they become adults. Some more than others.